diff --git a/o2server/gulpfile.js b/o2server/gulpfile.js
index abb6190a48b0bb86ab0995874686900d4910d091..3dee65f43cc81ae02544d0570bf23bb79648cfbf 100644
--- a/o2server/gulpfile.js
+++ b/o2server/gulpfile.js
@@ -193,7 +193,7 @@ function getMoveTask(path){
 function getCleanTask(path){
     return function(cb){
         var dest = destDir+path+'/';
-        del(dest, cb);
+        del(dest, {"force": true}, cb);
     }
 }